JP6330502B2 - Wireless communication apparatus and wireless communication method - Google Patents

Description

  The present invention relates to a wireless communication device that operates intermittently.

  In a system including a large number of wireless communication devices (hereinafter referred to as wireless devices) such as a wireless sensor network, whether or not power can be supplied when installing the wireless device is a restriction. If the wireless device itself can supply power, such as holding the battery, the location can be freely selected when installing the wireless device. As a method of supplying power by the radio device itself, for example, there is energy harvesting in addition to the battery. Energy harvesting is a technology that converts the light, heat, vibration, and radio wave energy around you into electrical energy.

  However, the amount of power supplied by batteries and energy harvesting is limited. In order to operate the radio continuously over a long period of time, it is required to reduce power consumption as much as possible. One technique for reducing the power consumption of a wireless device in operation is to intermittently operate the wireless device. The wireless device operates the circuit only during communication with other devices, and puts the circuit in the sleep state during other periods. In the sleep state, power consumption is reduced.

  Patent Document 1 discloses a technique for operating only a function for determining whether received data is addressed to itself when a wireless device is activated and waiting to receive data from another device. The wireless device operates other circuits necessary for processing the received data only when data addressed to itself is detected.

Special table 2011-527873 gazette

  However, since the wireless device of Patent Document 1 operates a circuit necessary for processing received data after detecting data addressed to itself, it transmits response data to data received from the wireless device of the communication destination. In this case, it takes time to start processing the received data, and a delay occurs in the response to the communication destination wireless device.

  The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to obtain a wireless communication apparatus that reduces delay when response data is transmitted to data received from a communication destination wireless device. It is aimed.

A part of the device is a wireless communication device that repeats wake-up and sleep, and communication is performed based on information on an intermittent cycle in which a part of the communication destination device operates intermittently, which is notified from the communication destination device. A timing calculation unit that calculates the wake-up time when a part of the previous device wakes up, and a timing management unit that instructs wake-up of a part of the own device when the wake-up time is reached when a part of the device is sleeping And a radio processing unit that resumes radio signal transmission / reception processing according to an instruction from the timing management unit, and the timing calculation unit is a time at which the first communication destination device under its own apparatus starts an intermittent period. The wireless processing unit calculates an offset value for waking up the first communication destination device in accordance with the time at which the second communication destination device under its own device wakes up. and it sends it to the communication destination apparatus .

  ADVANTAGE OF THE INVENTION According to this invention, when transmitting response data with respect to the data received from the communication destination radio | wireless machine, a delay can be reduced.

2 is a block diagram illustrating a configuration of a wireless device according to Embodiment 1. FIG. 3 is a diagram illustrating an example of a network configuration of a wireless device according to Embodiment 1. FIG. FIG. 3 is a sequence diagram showing a flow of processing of radio path construction and data communication according to the first embodiment. 4 is a flowchart showing a flow of route construction processing in the wireless device according to the first embodiment. 4 is a flowchart showing a flow of data communication processing in the wireless device according to the first embodiment. FIG. 9 is a sequence diagram showing a flow of processing of radio path construction and data communication according to the second embodiment.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of radio apparatus 10 according to the first embodiment. A wireless device 10 as a wireless communication device includes an antenna 11, a wireless processing unit 12, a signal processing unit 13, a destination detection unit 14, an operation control unit 15, a timing calculation unit 16, a timing information holding unit 17, and a timing management unit 18. Is done.

  When the antenna 11 receives a radio signal from another radio device, the antenna 11 outputs it to the radio processing unit 12. The wireless processing unit 12 performs reception processing of the wireless signal received from the antenna 11 and outputs the received signal to the signal processing unit 13. In addition, the wireless processing unit 12 extracts destination information from the wireless signal and outputs the destination information to the destination detection unit 14. The destination detection unit 14 outputs a reception notification to the operation control unit 15 when the destination information is its own radio. The operation control unit 15 notifies the destination detection unit 14 of the identifier of its own radio device in advance. When the reception notification is input from the destination detection unit 14, the operation control unit 15 instructs the signal processing unit 13 to acquire reception data from the wireless processing unit 12. The signal processing unit 13 outputs the received data to a device outside the radio device 10 as necessary.

  The signal processing unit 13 notifies the operation control unit 15 when transmission data is input from an external device. In response to an instruction from the operation control unit 15, the signal processing unit 12 performs transmission processing of transmission data and outputs the transmission data to the wireless processing unit 12. The wireless processing unit 12 transmits the transmission data as a wireless signal to another wireless device via the antenna 11. Note that the operation control unit 15 instructs the signal processing unit 12 to transmit data as necessary other than when transmission data is input from an external device.

  The wireless device 10 sleeps intermittently. When sleeping, the wireless device 10 enters a power saving state. The timing management unit 18 holds a sleep time to sleep next and a wake time to wake up next. When the sleep time comes, the timing management unit 18 instructs the operation control unit 15 to sleep. When the wake-up time is reached, the timing management unit 18 instructs the operation control unit 15 to wake up. The operation control unit 15 outputs instructions to the wireless processing unit 12, the signal processing unit 13, and the destination detection unit 14.

  The timing calculation unit 16 calculates the next wake-up time of the wireless device from information on the intermittent period notified from the other wireless device, and stores it in the timing information storage unit 17. The timing management unit 18 takes out the next wake-up time of another radio from the timing information storage unit 17 and instructs the operation control unit 15 to wake up in accordance with the time.

  When a wireless signal is input from the antenna 11, the wireless processing unit 12 extracts destination information indicating a destination of received data from the wireless signal. The destination information is given by the transmitting-side radio as information designating a radio that should receive the data according to a predetermined rule. The destination information is an identifier that uniquely identifies the wireless device. The destination information may be a broadcast identifier used when distributing the same data to a plurality of wireless devices.

  When the signal processing unit 13 acquires the reception data from the wireless processing unit 12, the signal processing unit 13 performs signal processing and outputs the received data to a device outside the wireless device 10 as necessary. Further, the signal processing unit 13 performs signal processing of data input from an external device or data generated in the wireless device 10 and outputs the processed signal to the wireless processing unit 12. Further, the signal processing unit 13 notifies the contents of the operation status of itself or the data acquired from the wireless processing unit 12 or an external device if control or notification information addressed to the own wireless device is included. Therefore, an operation state notification is output to the operation control unit 15. The own operation state is a state in communication processing such as transmission processing, reception processing, and standby. When the information for notification to the own radio device includes information on the intermittent period of another radio device, the signal processing unit 13 outputs this information to the timing calculation unit 16.

  The destination detection unit 14 compares the destination information input from the wireless processing unit 12 with the stored identifier of the own radio device. The identifier of the own wireless device is information input from the operation control unit 15. If the destination information matches the identifier of the own radio device, the destination detection unit 14 determines that the received data included in the received signal is data addressed to itself, and outputs a reception notification to the operation control unit 15. The destination detection unit 14 determines that the data is addressed to itself even when the destination information is a broadcast identifier.

  The operation control unit 15 outputs the identifier of the own radio device to the destination detection unit 14. The identifier of the own wireless device is a condition for determining whether the received signal is data addressed to itself. In addition, the operation control unit 15 determines the control content based on the operation state notification input from the signal processing unit 13 or the reception notification from the destination detection unit 14 and instructs the signal processing unit 13. The operation state notification includes information on the state of the signal processing unit 13 and transmission / reception data. One or more pieces of information may be included in the operation state notification. When a plurality of information is included in the operation state notification, the operation control unit 15 responds to the plurality of information and instructs the signal processing unit 13.

  For example, when a response to the received data is required, the operation control unit 15 instructs the signal processing unit 13 to transmit the response data. When it is necessary to output received data to an external device, the operation control unit 15 instructs the signal processing unit 13 to transmit the data to the external device.

  Further, the operation control unit 15 wakes up in response to a wake-up instruction from the timing management unit 18. In addition, when the sleep is instructed from the timing management unit 18 due to the intermittent period, the operation control unit 15 enters the power saving state and sleeps.

When the information on the intermittent period of another radio is input from the signal processing unit 13, the timing calculation unit 16 calculates the next wake-up time of the radio and stores it in the timing information storage unit 17. The information on the intermittent period notified by another wireless device includes an interval at which the wireless device wakes up and a sleep time indicating a sleep time.
The timing information storage unit 17 stores the next wake-up time and sleep time of a plurality of other wireless devices in association with identification information for identifying the wireless devices.

  The timing management unit 18 holds information on the intermittent period of the own radio device, and instructs the operation control unit 15 to wake up at the next wake-up time. The timing management unit 18 calculates the next wake-up time by adding the time of the intermittent cycle to the current time every time it wakes up at the intermittent cycle. In addition, when it is time for the wireless device to sleep, the operation control unit 15 is instructed to sleep. The timing management unit 18 takes out the next wake-up time of a plurality of other wireless devices stored in the timing information storage unit 17 and instructs the operation control unit 15 to wake up in accordance with the time. The timing management unit 18 may instruct the operation control unit 15 to wake up in consideration of the time required for the operation control unit 15 to start the operation.

  FIG. 2 is a diagram illustrating an example of a network configuration of the radio devices 10a to 10d according to the first embodiment. The radio devices 10a to 10d are the radio device 10 of FIG. The network 21 is a network including the radio devices 10a to 10d. The radio devices 10a to 10d correspond to any one of the parent device, the child device, and the repeater, and recognize in advance which one corresponds. The wireless device 10a is a parent device. The wireless device 10b is a repeater that relays communication between the wireless device 10a, the wireless device 10c, and the wireless device 10d. The wireless device 10d is a child device. The master unit aggregates communications from the slave units and repeaters in the network and communicates with a host device (not shown). For example, the higher-level device may be a device that aggregates communications of a plurality of networks. The configuration in FIG. 2 is an example, and the number and configuration of the parent device, the child device, and the repeater are not limited to this.

  The radio devices 10a to 10d recognize in advance which of the parent device, the child device, and the repeater corresponds. Whether the wireless devices 10a to 10d correspond to a parent device, a child device, or a repeater may be initially set, or may be set via a network or directly after activation. .

Next, the operation in the network 21 will be described.
FIG. 3 is a sequence diagram illustrating a flow of processing of path construction and data communication of the radio devices 10a to 10d according to the first embodiment.

  In order to enter the network 21, the wireless device 10 b that is a repeater transmits an entry notification to the parent device or another repeater. At this time, since the wireless device 10b does not know the parent device or other repeaters of the network 21, for example, the wireless device 10b broadcasts an entry notification. The entry notification includes the address of the wireless device 10b that is the transmission source and a network ID that identifies the network 21 to be entered (step S301).

  The wireless device 10a that is the parent device receives the entry notification from the wireless device 10b. Since the network ID included in the entry notification from the wireless device 10b is the network 21 to which the wireless device 10a itself belongs, the wireless device 10a transmits a route information notification to the wireless device 10b. The route information notification notifies the wireless device 10b that the wireless device 10a is a parent device and includes information on a route from the wireless device 10a to a communication device (not shown). By receiving the route information notification, the wireless device 10b recognizes that the wireless device 10a is a parent device (step S302).

  The wireless device 10c that is the slave device transmits an entry notification to the master device or the repeater (step S303). In addition, the wireless device 10d that is the slave device transmits an entry notification to the parent device or the repeater (step S304). At this time, the radio devices 10c to 10d do not grasp the parent device or the repeater.

  The wireless device 10b, which is a repeater, receives entry notifications from the wireless devices 10c to 10d and transmits route information notifications. The wireless device 10b notifies the wireless devices 10c to d of the fact that it is a repeater and the route from the wireless device 10b to the wireless device 10a (steps S305 to S306).

Upon receiving the route information notification, the wireless device 10c transmits an entry completion notification to the wireless device 10b. The entry completion notification includes information on the intermittent period of the wireless device 10c. The intermittent period information includes the sleep time Ta of the wireless device 10c (step S307).
Upon receiving the entry completion notification, the wireless device 10b transmits ACK to the wireless device 10c. Further, the wireless device 10b starts measuring the sleep time Ta of the wireless device 10c notified by the entry completion notification. When receiving the ACK, the wireless device 10c sleeps (step S308).

Upon receiving the route information notification, the wireless device 10d transmits an entry completion notification to the wireless device 10b. The entry completion notification includes information on the intermittent period of the wireless device 10d. The intermittent period information includes the sleep time Tb of the wireless device 10d (step S309).
Upon receiving the entry completion notification, the wireless device 10b transmits ACK to the wireless device 10d. Further, the wireless device 10b starts measuring the sleep time Tb of the wireless device 10d notified by the entry completion notification. When receiving the ACK, the wireless device 10d sleeps (step S310).

The wireless device 10b transmits an entry completion notification to the wireless device 10a. The wireless device 10b, which is a repeater, notifies the wireless device 10a that the wireless device 10b itself enters the network 21 and relays communication with the wireless devices 10c to 10d by an entry completion notification (step S311).
Upon receiving the entry completion notification, the wireless device 10a transmits ACK to the wireless device 10b. When receiving the ACK from the wireless device 10a, the wireless device 10b sleeps (step S312).

When the sleep time Ta elapses, the wireless device 10c wakes up and transmits a transmission request to the wireless device 10b. At this time, the wireless device 10b wakes up because Ta has elapsed after transmitting ACK in step S308, and receives a transmission request (step S313).
When receiving the transmission request, the wireless device 10b transmits ACK to the wireless device 10c (step S314).
When receiving the ACK, the wireless device 10c transmits data. When the communication is completed, the wireless device 10b sleeps again (step S315).

When the sleep time Tb elapses, the wireless device 10d wakes up and transmits a transmission request to the wireless device 10b. At this time, the wireless device 10b wakes up because Tb has elapsed after transmitting ACK in step S310, and receives a transmission request (step S316).
When receiving the transmission request, the wireless device 10b transmits ACK to the wireless device 10d (step S317).
When receiving the ACK, the wireless device 10d transmits data. When the communication is completed, the wireless device 10b sleeps again (step S318).

  In addition, when a wireless device that is a repeater or a slave device is activated, an entry notification is periodically transmitted until entry into any network is completed. In addition, a wireless device that is a repeater or a slave device may receive route information notification from a plurality of wireless devices. In this case, the wireless device, which is a repeater or a slave, selects a parent device or a repeater based on the received route information.

Next, the operation in the radio device 10 will be described. First, the operation from the start of the wireless device 10 to the path construction will be described.
FIG. 4 is a flowchart showing a flow of path construction processing in radio apparatus 10 according to the first embodiment.

When the wireless device 10 is activated, the operation control unit 15 instructs the signal processing unit 13 to transmit an entry notification. The signal processing unit 13 generates an entry notification and outputs it to the wireless processing unit 12. The wireless processing unit 12 transmits an entry notification to another wireless device. The wireless processing unit 12 and the signal processing unit 13 are in a reception waiting state (step S401).
When receiving the route information notification from another wireless device, the wireless processing unit 12 outputs the notification to the operation control unit 15 via the signal processing unit 13 (step S402).

The operation control unit 15 notifies the timing management unit 18 that the route information notification has been received. The timing management unit 18 starts a route construction timer. Until the path construction timer expires, the operation control unit 15 waits to receive an entry notification from another wireless device or an entry completion notification addressed to the own wireless device (step S403).
When the signal received from the wireless processing unit 12 is input, the signal processing unit 13 determines whether it is an entry notification from another wireless device or an entry completion notification addressed to the own wireless device. If the received signal is not an entry notification from another wireless device or an entry completion notification addressed to the own wireless device, the process proceeds to step S409 (step S404).

When the received signal is an entry completion notification (step S405), the signal processing unit 13 notifies the timing calculation unit 16 of information on the transmission source intermittent period included in the entry completion notification (step S406).
The timing calculation unit 16 calculates the next wake-up time from the intermittent period information, and stores the transmission completion address and the next wake-up time in the timing information storage unit 17 (step S407).
The signal processing unit 13 generates an ACK for the wireless device that is the transmission source of the entry completion notification, and transmits the ACK through the wireless processing unit 12 (step S408).

  In step S405, if the received signal is not an entry completion notification, the signal processing unit 13 transmits a route information notification to the entry notification transmission source radio device via the wireless processing unit 12.

When the route construction timer expires, the timing management unit 18 notifies the operation control unit 15. If the route construction timer has not expired, the process returns to step S404 (step S409).
The operation control unit 15 instructs the signal processing unit 13 to transmit an entry completion notification to the wireless device that has received the route information notification. The signal processing unit 13 transmits an entry completion notification via the wireless processing unit 12 (step S410).

The operation control unit 15 receives the ACK for the entry completion notification transmitted via the wireless processing unit 12 and the signal processing unit 13. Further, the operation control unit 15 notifies the timing management unit of reception of ACK (step S411).
The timing management unit 18 acquires information on the intermittent period of another wireless device from the timing information storage unit 17 and sets a timer so as to be activated in accordance with the next wake-up time of the other wireless device. The timing management unit 18 instructs the operation control unit 15 to sleep. In response to an instruction from the operation control unit 15, the wireless processing unit 12, the signal processing unit 13, and the destination detection unit 14 sleep, and the process ends (step S412).

Next, the data communication operation of the wireless device 10 will be described.
FIG. 5 is a flowchart showing a flow of data communication processing in radio apparatus 10 according to the first embodiment.

When the sleep timer expires (step S501), the timing management unit 18 outputs a wake-up instruction to the operation control unit 15. (Step S502).
The operation control unit 15 wakes up and instructs the wireless processing unit 12, the signal processing unit 13, and the destination detection unit 14 to wake up. The operation control unit 15 sets destination information in the destination detection unit 14 (step S503).

The timing management unit 18 activates a wake-up timer based on the wake-up time set in advance (step S504).
The wireless processing unit 12 and the destination detection unit 14 are in a reception waiting state (step S505).

When the wireless processing unit 12 detects a signal, the wireless processing unit 12 outputs signal destination information to the destination detection unit 14. The destination detection unit 14 determines whether or not the signal is addressed to the own radio device from the input destination information (step S506).
In the case of a signal addressed to the own radio device, the destination detection unit 14 outputs a reception notification to the operation control unit 15 (step S507).
The operation control unit 15 instructs the signal processing unit 13 to acquire a reception signal from the wireless processing unit 12 (step S508).

  The signal processing unit 13 outputs a response signal for the received data to the wireless processing unit 12 as necessary. Further, in response to an instruction from the operation control unit 15 or an external device, the signal processing unit 13 transmits / receives a signal to / from another wireless device via the wireless processing unit 12. The content of the signal is, for example, a transmission request, an ACK corresponding to the transmission request, application data, or the like (step S509).

  When signal transmission / reception is completed (step S510), the timing management unit 18 inquires of the timing information storage unit 17 and acquires the next wake-up time of another radio device that wakes up next. The timing management unit 18 sets a timer for starting, and instructs the operation control unit 15 to sleep. In response to an instruction from the operation control unit 15, the wireless processing unit 12, the signal processing unit 13, and the destination detection unit 14 sleep, and the process ends (step S511).

  In step S506, when the signal received by the wireless processing unit 12 is not a signal addressed to the own wireless device, the timing management unit 18 determines whether the wake-up timer has expired. If the wake-up timer has not expired, the process returns to step S505. If the wake-up timer has expired, the process ends at step S511 (step S506).

  In the present embodiment, the network formed by the wireless device 10 is not limited to a mesh network, but is a relay that relays communication from other wireless devices 10 or a parent that consolidates communication from other wireless devices 10. Machine, the effect of reducing the delay can be obtained.

  Therefore, in this embodiment, a part of the apparatus is a wireless communication apparatus that repeats wakeup and sleep, and the part of the communication destination apparatus that is notified from the communication destination apparatus operates intermittently. Based on the period information, a timing calculator that calculates the next wake-up time when a part of the communication destination device wakes up A timing management unit for instructing to wake up and a wireless processing unit for resuming transmission / reception processing of a radio signal according to an instruction from the timing management unit. , The delay can be reduced. Further, when the communication destination wireless device transmits data and waits for reception of response data while waking up, the power consumption of the communication destination wireless device can be reduced.

Embodiment 2. FIG.
In the first embodiment described above, the wireless device wakes up in accordance with the wake-up time of the other wireless device. However, in the present embodiment, the timing of the intermittent period of the other wireless device is shifted. Shows an embodiment in which the number of times the wireless device wakes up is reduced.
The wireless device in the present embodiment has the configuration of the wireless device 10 in FIG. The network configuration is the network 21 in FIG. Only parts different from the first embodiment will be described.

  When the number of repeaters and slaves that the wireless device 10 aggregates increases, the number of times that the wireless device 10 wakes up increases in accordance with the wake-up time of the wireless device, and power consumption increases. Therefore, the present embodiment shifts the start timing of the intermittent cycle of the communication destination wireless device, and the number of times the own wireless device wakes up by causing the communication destination wireless device to wake up during the period in which the own wireless device wakes up. Reduce power consumption.

An operation in the network 21 will be described.
FIG. 6 is a sequence diagram showing a flow of processing of path construction and data communication of the radio devices 10a to 10d according to the first embodiment. In steps S601 to S606 in FIG. 6, the same processing as that in steps S301 to S306 in FIG. 3 is performed, and then the processing is performed from step S607 in FIG.

The wireless device 10c transmits an entry completion notification to the wireless device 10b. The entry completion notification includes information on the intermittent period of the wireless device 10c. The information on the intermittent period includes information on the sleep time Ta of the wireless device 10c (step S607).
Upon receiving the entry completion notification, the wireless device 10b transmits ACK to the wireless device 10c. The ACK includes an offset value for delaying the timing for starting the intermittent period. At this time, since the wireless device 10b has received the entry completion notification only from the wireless device 10c, the wireless device 10b sets the offset value to 0 and does not change the timing for starting the intermittent cycle of the wireless device 10c. The wireless device 10b starts measuring the sleep time Ta of the wireless device 10c notified by the entry completion notification. When receiving the ACK, the wireless device 10c sleeps (step S608).

The wireless device 10d transmits an entry completion notification to the wireless device 10b. The entry completion notification includes information on the intermittent period of the wireless device 10d. The information on the intermittent period includes information on the sleep time Tb of the wireless device 10d (step S609).
When receiving the entry completion notification, the wireless device 10b transmits an ACK including the offset value Tf to the wireless device 10d. At this time, the wireless device 10b has already transmitted ACK to the participation completion notification to the wireless device 10c. Therefore, the timing calculation unit 16 of the wireless device 10b calculates the offset value Tf so that the wireless device 10d wakes up in accordance with the time when the wireless device 10c wakes up. The wireless device 10b starts measuring the time obtained by combining the offset value Tf and the sleep time Tb as the time when the wireless device 10d wakes up next. When receiving the ACK, the wireless device 10d sleeps after the offset value Tf has elapsed (step S610).

The wireless device 10b transmits an entry completion notification to the wireless device 10a. The wireless device 10b, which is a repeater, notifies the wireless device 10a that the wireless device 10b itself enters the network 21 and relays communication with the wireless devices 10c to 10d by an entry completion notification (step S611).
Upon receiving the entry completion notification, the wireless device 10a transmits ACK to the wireless device 10b. When receiving the ACK, the wireless device 10b goes to sleep (step S612).

When the sleep time Ta elapses, the wireless device 10c wakes up and transmits a transmission request to the wireless device 10b. At this time, the wireless device 10b wakes up because the sleep time Ta has elapsed after transmitting ACK in step S608, and receives a transmission request (step S613).
When receiving the transmission request, the wireless device 10b transmits ACK to the wireless device 10c (step S614).
When receiving the ACK, the wireless device 10c transmits data. (Step S615).

The wireless device 10d wakes up when the offset value Tf and the sleep time Tb have elapsed, and transmits a transmission request to the wireless device 10b. (Step S616).
Upon receiving the transmission request, the wireless device 10b transmits ACK to the wireless device 10d (step S617).
When receiving the ACK, the wireless device 10d transmits data. The process ends (step S618).

  In addition, when the information on the intermittent period is notified by the entry completion notification from a plurality of communication destination wireless devices, the offset may be calculated in accordance with the wireless device that wakes up the earliest.

  Therefore, in the present embodiment, when the timing calculation unit is notified of intermittent period information from a plurality of communication destination devices, a plurality of timing calculation units are configured based on the wake-up time of one of the plurality of communication destination devices. The offset value that delays the time at which the other communication destination device starts the intermittent period is calculated, and the wireless processing unit transmits the offset value to the communication destination device, thereby reducing the number of times the own wireless communication device wakes up. can do. Therefore, the power consumption of the own wireless communication device can be reduced.

DESCRIPTION OF SYMBOLS 10 Radio | wireless machine 11 Antenna 12 Wireless processing part 13 Signal processing part 14 Destination detection part 15 Operation control part 16 Timing calculation part 17 Timing information preservation | save part 18 Timing management part

Claims (6)

A part of the device is a wireless communication device that repeats waking up and sleeping,
Timing for calculating a wake-up time when a part of the communication destination device wakes up next, based on information on an intermittent period in which the part of the communication destination device operates intermittently notified from the communication destination device A calculation unit;
When a part of the own device is sleeping, a timing management unit that instructs to wake up a part of the own device when the wake-up time is reached,
In response to an instruction from the timing management unit, a wireless processing unit that resumes transmission / reception processing of a wireless signal;
Equipped with a,
The timing calculation unit delays the time at which the first communication destination device under its own apparatus starts an intermittent period and adjusts the second communication destination device under its own device to wake up. Calculate the offset value to wake up the device of 1 communication destination,
The wireless processing unit, a wireless communication device characterized that you send the offset value to the device of the first communication destination. In association with an identifier identifying the communication destination apparatus, inputted from the timing calculation unit, a timing storage unit for storing the next wake-up time of the communication destination device,
A signal processing unit that performs signal processing of a reception signal input from the wireless processing unit and a transmission signal output to the wireless processing unit;
A destination detecting unit the destination information of the wireless signal received the communication destination of instrumentation placed al it is detected whether or not matches the identifier indicating the own apparatus,
In response to an instruction from the timing management unit, an operation control unit that causes the wireless processing unit, the signal processing unit, and the destination detection unit to sleep or wake up,
The wireless communication apparatus according to claim 1, further comprising: 3. The timing management unit according to claim 1 or 2 , wherein when the offset value is input, the timing management unit instructs sleep after a time indicated by the offset value has elapsed from a time when the device itself sleeps. The wireless communication device described. Constitute a mesh network, a wireless communication apparatus according to any one of claims 1, characterized in that to relay communications from communication destination device 3. Constitute a mesh network, a wireless communication apparatus according to claim 1 or 2, characterized in that a master unit that aggregates communication from communication destination device. A part of the device is a wireless communication method in which waking up and sleeping are repeated,
Timing for calculating a wake-up time when a part of the communication destination device wakes up next, based on information on an intermittent period in which the part of the communication destination device operates intermittently notified from the communication destination device A calculation step;
When a part of the own device is sleeping, a timing management step for instructing to wake up a part of the own device when the wake-up time is reached,
In response to an instruction from the timing management step, a wireless processing step for resuming wireless signal transmission / reception processing;
I have a,
The timing calculation step delays the time at which the first communication destination device under its own device starts the intermittent period, and adjusts the second communication destination device under its own device to wake up. Calculate the offset value to wake up the device of 1 communication destination,
The wireless processing step, the radio communication method that sends the offset values to the apparatus of the first communication destination.

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